DefenderShield

EMF Radiation Protection Baseball Cap

Name: EMF Radiation Protection Baseball Cap
Rating: 4.41 (37 reviews)

$64.99 USD

~~$84.99 USD~~ $64.99 USD

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Shipping calculated at checkout.

A structured mid-profile baseball cap with a silver shielding interior that blocks up to 99% of wireless RF radiation (10 KHz - 40 GHz) from reaching your head. Nylon/Spandex outer material (90/10) with adjustable VELCRO® back strap and no back opening for seamless shielding coverage across the entire crown of your head. Antimicrobial silver lining. UV protection for outdoor use. Black. Fits up to 23.5” circumference.

Frequency Range RF (up to 40 GHz)
Performance Versatile Everyday Wireless Protection
Flexibility Maximum + stretch
Best Application Wearable protection from your WiFi router, cellular signals, hotspot, and even low to mid-band 5G signals. Protects your body instead of a specific device, so can be more versatile for blocking multiple sources of EMF. Great for traveling in EMF-dense public places like airports, malls, coffee shops.

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Good to know

The Advanced Wireless Shielding covers the entire inside of the cap. The brim provides additional shade and UV protection but is not shielded. The face, ears, and neck are not covered. The VELCRO back closure has no opening, so there is no gap in the shielding across the back of the head. For full-head coverage, pair with the EMF Protection Wrap Scarf for neck coverage.

Description
Key Features
How to Use
Specifications
Video

Description

EMF Shielding in a Cap You Can Wear Every Day

Cell towers, WiFi routers, Bluetooth devices, and 5G infrastructure broadcast wireless RF radiation from every direction. Your head and brain is exposed to these ambient signals during commutes, at the office, while walking outdoors, and in public spaces. A standard baseball cap shades your face. This one shades your face and shields your head from wireless radiation.

The DefenderShield® EMF Radiation Protection Baseball Cap is lined with a silver shielding interior fabric that blocks up to 99% of wireless RF radiation from 10 KHz - 40 GHz - covering WiFi, Bluetooth, cellular signals, and low- to mid-band 5G frequencies. The VELCRO back strap has no opening - the shielding coverage wraps continuously around the crown of your head from front to back with no gap for radiation to pass through.

A Performance Cap That Blocks RF and UV

The outer shell is 90% Nylon / 10% Spandex - lightweight, breathable, and performance-ready. The structured mid-profile design sits comfortably on a wide range of head shapes. The brim provides UV protection, helping shield your scalp and face from sun exposure during outdoor use.

The silver shielding interior is naturally antimicrobial, resisting odor and bacteria buildup during extended wear. The adjustable VELCRO strap fits head circumferences up to 23.5 inches. Available in Black.

Key Features

🛡️ Silver Shielding Interior - Up to 99% RF Blocking (10 KHz - 40 GHz)
The interior of the cap is lined with silver shielding fabric that blocks up to 99% of wireless RF radiation from WiFi, Bluetooth, cellular, and low- to mid-band 5G. The shielding covers the entire crown of the cap, from front to back. 🧢 No Back Opening - Seamless Crown Shielding
The VELCRO back strap allows you to adjust the size without a gap or opening. Unlike standard baseball caps with a cutout or hole in the back, this cap provides continuous shielding across the entire crown. No gap means no unshielded path for RF radiation to reach the back of your head. 🎽 Performance Nylon/Spandex Outer - Lightweight and Breathable
The 90% Nylon / 10% Spandex outer shell is lightweight, breathable, and quick-drying. The structured mid-profile design looks like a standard performance cap and works for commuting, travel, outdoor activities, and wearing in areas with EMF exposure.
🧫 Antimicrobial Silver Lining - Resists Odor and Bacteria
The silver shielding interior is naturally antimicrobial. It resists odor and bacteria buildup during extended daily wear, reducing the need for frequent washing. ☀️
UV Protection - Shields Scalp and Face from Sun Exposure The cap’s brim and crown provide UV light blocking, helping protect your scalp and face during outdoor wear. EMF shielding and sun protection in a single cap.
🔄 Adjustable VELCRO Strap - Fits Up to 23.5”
The back strap adjusts to fit head circumferences up to 23.5 inches. The VELCRO closure is quick to adjust and holds securely throughout the day.

How to Use

Wearing the Cap

1. Put the cap on like a regular baseball cap. The silver shielding interior covers the entire inside of the cap.

2. Adjust the VELCRO strap for a snug fit. A secure fit ensures the shielding stays in full contact with the crown of your head.

3. Wear it in any environment. Commuting, outdoor activities, office, travel, or any setting with ambient wireless signals.

What the Cap Covers and What It Does Not

• Covered: crown of the head (top and sides), with continuous shielding from front to back (no back opening). The brim provides UV protection.

• Not covered: face, ears, and neck. For neck and upper-body coverage, pair with the EMF Protection Wrap Scarf. For full-head winter coverage, switch to the EMF Protection Winter Beanie.

Care Instructions

• Hand wash cold with gentle detergent. Air dry.

• Do not bleach, machine wash, or tumble dry.

• The antimicrobial silver lining reduces odor - frequent washing is not necessary.

• Gentle care preserves the shielding integrity of the silver interior.

Specifications

Specification	Detail
Shielding Technology	Silver shielding interior fabric
Shielding Effectiveness	Up to 99% of wireless RF radiation (10 KHz - 40 GHz)
RF Sources Blocked	WiFi · Bluetooth · Cellular · 5G (low/mid-band)
Shielding Coverage	Crown (top + sides + back - no opening)
UV Protection	Yes - brim and crown
Antimicrobial	Yes - silver interior
Outer Material	90% Nylon / 10% Spandex
Inner Lining	Silver shielding fabric
Profile	Structured mid-profile
Closure	Adjustable VELCRO strap (no back opening)
Max Circumference	23.5 in
Color	Black
Care	Hand wash cold · Air dry · No bleach/machine wash
HSA / FSA Eligible	Yes - see if you qualify at checkout
Warranty	1-year manufacturer warranty
Weight	2 oz
Package Dimensions	11x11x1

Video

See how our EMF Protection Baseball Cap fits, feels, and performs in real-world conditions. Watch the video below to learn more.

Feature	DefenderShield Baseball Cap	DefenderShield Winter Beanie	Generic EMF Cap	Standard Baseball Cap
RF shielding	Up to 99% (10 kHz – 40 GHz)	Up to 99% (silver liner)	Varies — often unverified	None
Seamless back (no opening)	VELCRO closes fully	Pull-on (no opening)	Varies — often has back gap	Often has opening
UV protection	Brim + crown	Not UV-rated	Varies	Brim
Cold-weather warmth	Lightweight (not insulated)	Cotton-acrylic insulation	Varies	Varies
Antimicrobial	Silver interior	Not specified	Varies	No
Outer material	90% nylon / 10% spandex	60% cotton / 40% acrylic	Varies	Varies
Fit	Adjustable VELCRO (up to 23.5 in)	Stretchy (18–26 in)	Varies	Adjustable
Medical Advisory Board	Full board	Full board	No	No
Warranty	1 year	1 year	30–90 days	Varies
Best for	Year-round head shielding + UV protection	Cold-weather head shielding + warmth	Basic head RF reduction	Sun shade only

5 stars: 26 (70%)
4 stars: 2 (5%)
3 stars: 7 (19%)
2 stars: 2 (5%)
1 star: 0 (0%)

EMF Radiation Protection Baseball Cap

Hat was not nice

Hi Anthony,

We're sorry to hear you didn't enjoy the hat.

Please reach out to our support team, support@defendershield.com, so we can help you.

Best Wishes,

The DefenderShield Team

Excellent product.

It fits well. I can tell that I sleep better after wearing the ballcap for most of the day. I do think it is a well made cap and the fabric is attractive and durable,

Not for smaller heads

I would have given this 5 stars however since the cap is not made for smaller heads, I am giving it 3 stars. To make it fit snug I have to adjust the velcro strip to its limits and it causes it to hang out the back and it looks goofy. The material is good though and the shipping is prompt.

Hello,

Thank you for taking the time to get in touch, and for pointing out these issues. We work hard to give all of our customers a great experience, and we want to keep improving. We've notified our development team and have passed your suggestion. Most of our products are created based on customer feedback, requests and needs. We really appreciate both kindness and honesty.

Warm regards,
The DefenderShield Team
-----------------------------------------------------
----------------------------------------------------
support@defendershield.com

For additional questions and product information visit our FAQs.

Great style and comfort

I’ve had this cap for a couple of months now and I must say that it looks and feels great. It fit perfectly straight out of the box. I’m happy with the black color, but I can understand why some would like to see this cap offered in other colors. You can’t really wash this cap as you can other baseball caps due to the material, so you have to take very good care of it.

Baseball cap

I like the cap. But hope in the future you can make other colors. Black cap isn’t great summer color. Please consider pink .

Good, a little wide for me but ok. Good material.

EMF Radiation Protection Baseball Cap

Happy to receive my cap and have been wearing it when I go for walks everyday - along with my defendershield little over the shoulder bag where I keep my phone. The only issue I have with the cap is that I have the velcro adjustment strapped pulled across to its limits (small head?), and this then causes the cap to “bubble” in various areas across the top of my head-which isn’t the look I was going for if you know what I mean. Overall I am glad to look like a bubble headed fool for the protection - but it would be great if you could make the cap in 3 sizes - with measurements - because lets face it - one size doesn’t fit all .

Hat

It's a little small.

Hello,

Thank you for contacting us. We apologize that you're not satisfied with your product. We ask that you please initiate your return request using the link on our website.

The Warranty/Returns Team will follow up when the online form (link below) has been submitted.
After pressing the 'submit' button, please allow a few moments for the form to be submitted.
A message will appear that says 'Return Request Submitted Successfully'.

https://www.defendershield.com/returns

Best regards,

The DefenderShield Team
Warranty Department

Absolutely love the concept

I love the hat.. I definitely can see it being problematic if you have a big head and it not fitting. Mine fits but is snug. I do wish you could adjust it more. Only qualm is i wish they made the rf mesh extend out to the bill cap instead of it just civering the top of head for more extensive protection. On that note, I have bought quite a few items from Defendershield because of the quality.... I came from an RF safe sleeve over to defendershield phone sleeve and havent looked back since. Defendershields an industry standard known amongst anti EMF/Radiation Frequency crowd. You really cant go with their products. You know the saying.. You get what you pay for.. abd its no different with Defendershields products. I also own the Winter Beanie which I perfer to wear in winter over the hat cause it covers more area on my head. Still a great product if you happen to drive around or be by 5g towers etc

Great protection ball cap

Love it, fits good and no metal buckles!

Love this hat!

Fantastic! Perfect for the gym or out and about on errands. Love the full black design. No ponytail opening, so great for low side buns or side braid! Thank you so much for creating this! Infinite love, brightest blessings! <3

Nice hat

It fits my head lol ... Very good hat... Thank you

Cap

I love it and comfortable if dont use ponytail, it is comfortable

EMF Base Ball Cap

I gave my first cap to my granddaughter and then I purchased a new one for myself recently. I think this one actually fits better and I am wearing it most of the time. I make a point of wearing it in my car as well as outside. It is a must have item for all of us!

Should’ve read the fine print, I suppose

Wayyy too small. I can definitely feel the emf protection, I’m rather sensitive. But it’s uncomfortably small for me.
Measure your head before purchase (and take into account if you have a lot of hair on your head).
Because I technically wore it, there’s a 10% restocking fee, then I’d have to pay for shipping, and find the time to go to the shipping place.
No thanks!
This will now be used as a emf-proof pouch to put small electronic devices at night.

Hello,

Thank you for contacting DefenderShield. We apologize for the experience you've had with the baseball cap. We have passed this information on to our product development to improve future products. Should you choose to return the baseball cap the restocking fee will not charged as long as the cap in good condition. Returns can be initiated here: https://www.defendershield.com/returns for a full product refund.

Kindly,

The DefenderShield Team

My Cap.

Good quality, excellent material, and feels very comfortable to wear

Quality Product

Great Product! Need more than one size though.

ATTRACTIVE BASEBALL CAP

This is only the second such style of cap that has fit me this well. I cannot yet tell if it is protecting me from EMFs but I am trusting it is!

Too Small and Not Adjustable

I received this as a gift. I am a 5'5" woman with an average size head. The hat is too small and as I wear it, moves up my head and pops off. It tends to give me a headache. For the price, not worth the money if I can't keep it on my head and is not comfortable. The fabric quality seems excellent and sewn well. It looks good on. Would be a great hat if they work out the sizing. Going to see if I can exchange it for the beanie.

Hello Jackie,

Thank you for contacting us. We apologize that you're not satisfied with your product. We do not currently have an exchange program so in order to accomplish your request we ask that you please initiate your return using the link on our website: https://www.defendershield.com/returns We will promptly initiate the refund process upon receipt of the item and the correct product can then be purchased from our website at your convenience.

With gratitude,

The DefenderShield Team

Good looking hat

Excellent overall experience!

Not sure

Really hard to say about its protection. I do look like the uni-bomber, so I have gained some privacy. It’s a personal choice and is worth a try to someone struggling with EMF

Too small

It looks great and looks like high quality material. But it is too small for my head. If I put it on it is skin tight. I am not sure what to do with it. If it fit me well I would give it an excellent rating.

Hello Justin,

Thank you for contacting us. We apologize that you're not satisfied with your baseball cap and kindly ask that you initiate a return using the link on our website. We will promptly initiate the refund process upon receipt of the product. https://www.defendershield.com/returns

We are happy to be of any further assistance and look forward to serving you again in the future.

With gratitude,

The DefenderShield Team

Great customer service

Great customer service.

Defender Sheild is working on a larger size of the. Although it is sleek and protective. It's too small for me. They worked with me on a return for this reason

Works well

I know this cap works because the GPS on my Garmin watch didn’t work for most of my run yesterday. That was unfortunate for my run but I at least know this hat really does block frequencies.

Good quality

I found the cap to be helpful and well made. I tried the Wormore hat as well, but the Defendershield is much better quality. The lining goes all the way around inside the cap and the material is more form fitting. I just wish I had bought this cap earlier.

Good Purchase

The cap is comfortable and not too big. I'm a petite woman and it looks like a regular baseball cap. I'm grateful to have a summer option for protective headwear.

Great Cap

I love this cap! It looks like a regular cap from the store, so no one would know its EMF. I think the quality is great and love the fabric. I have a small head so it probably would be even better with someone with a bigger head, however, I think it still looks good on me. Highly recommend.

Use when gaming

I bought for my son to use while he’s gaming. So far he is able to wear it with his headphones over it without an issue

Stylish and Protective

Great fit, comfortable and I can feel the protection it provides.
Not to mention, its pretty stylish and sleek in black!

Ambient wireless RF radiation from the environment around you. Cell towers, WiFi, Bluetooth, and low- to mid-band 5G infrastructure broadcast RF signals continuously. The silver shielding interior blocks up to 99% of this radiation (300 Hz–10 GHz) from reaching the crown of your head. The brim also provides UV protection for your scalp and face during outdoor use.

To prevent a gap in the shielding. Most baseball caps have a cutout or hole in the back for the adjustable strap. This cap uses a VELCRO closure that closes fully without an opening, so the silver shielding interior covers the entire crown from front to back with no gap for RF radiation to pass through.

The cap is a year-round baseball cap with UV protection. The beanie is a warm winter hat. The baseball cap uses a Nylon/Spandex outer that is lightweight and breathable for warm weather and daily wear. The beanie uses a cotton-acrylic knit for cold-weather insulation. Both have silver shielding interiors. Choose the cap for spring, summer, and fall. Choose the beanie for winter. Layer both with the EMF Protection Wrap Scarf for neck coverage.

No - this uses silver shielding fabric designed for wearable comfort. DefenderShield device cases use Ultra Armor or Ultra Armor+®, which are rigid composites for blocking device-level radiation. The cap uses a silver shielding interior in a flexible fabric that covers your head comfortably during all-day wear. Both block wireless RF radiation; the materials and applications are different.

Low- to mid-band 5G frequencies, yes. The tested frequency range is 300 Hz–10 GHz, covering low-band (below 1 GHz) and mid-band (up to 6 GHz) 5G signals. The cap does not cover high-band mmWave 5G (24 GHz+). For device-level shielding across the full 0–110 GHz spectrum, see DefenderShield’s Ultra Armor+ phone cases and laptop shields.

Yes - the brim and crown help block UV light. In addition to RF shielding, the cap provides UV protection for your scalp and face during outdoor wear. This makes it a dual-function cap: wireless shielding and sun shade in one.

The crown - top and sides, plus the back (no opening). The face, ears, and neck are not covered by the shielding. For additional coverage, pair with the EMF Protection Wrap Scarf (neck) or the EMF Protection Sleep Mask (eyes/face).

Hand wash cold with gentle detergent. Air dry. Do not bleach, machine wash, or tumble dry. The antimicrobial silver interior reduces odor, so the cap needs less frequent washing than a standard hat. Gentle care preserves shielding performance.

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Designed by a Telecom Engineer.

DefenderShield was founded by Daniel T. DeBaun, a 30-year veteran of the telecommunications industry. Every product is engineered using shielding principles from military and industrial EMF protection, adapted for consumer devices.

Read the full DefenderShield story

Back to School Sale!

EMF Radiation Protection Baseball Cap

EMF Shielding in a Cap You Can Wear Every Day

A Performance Cap That Blocks RF and UV

Wearing the Cap

What the Cap Covers and What It Does Not

Care Instructions

DefenderShield Baseball Cap vs. The Alternatives